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Transparent organic silicon rigidity-increasing dope

A technology of silicone and hard coating, applied in coating, device for coating liquid on surface, surface pretreatment, etc., can solve the problems of difficult application of transparent plastic and low transparency of coating film.

Inactive Publication Date: 2008-04-30
朱凯琴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transparency of the coating film obtained by this method is not high, and it is not easy to apply on transparent plastics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a 20L four-necked glass bottle equipped with a PTFE stirring column, add 9.85kg of methyltriethoxysilane, 2.46kg of silicon-based latex, 10g of stearic acid and 0.2kg of water while stirring, at 25℃~30 The reaction was stirred continuously at ℃ for 24 hours. Finely filter the silicone resin polycondensate solution, add 5.65kg of ethanol diluent, and stir evenly; then add 40g of surfactant, and mix evenly. Discharging, sealed packaging.

[0019] The silicone resin hardened coating is applied and cured by coating, and the resulting coating is transparent and smooth, hard, compact and wear-resistant, and the pencil hardness reaches above 6H (measured according to the national standard GB / T6739-86 method with a Q H Q-A pencil hardness tester); corrosion resistance Excellent (CASS test method, Copper Accelerated Acetate Spray Method).

Embodiment 2

[0021] Add 8.78kg of methyltrimethoxysilane, 4.26kg of silicon-based latex, 22g of aluminum acetate and 0.2kg of water into a 20L four-neck glass bottle equipped with a PTFE stirring column while stirring. The reaction was stirred continuously for 30 hours. Finely filter the silicone resin polycondensate solution, add 10.65 kg of isopropanol diluent, and stir evenly; then add 50 g of surfactant, and mix evenly. Discharging, sealed packaging.

[0022] After the silicone resin hardening coating is coated and cured, the measured pencil hardness of the coating reaches more than 7H, and the corrosion resistance is excellent.

Embodiment 3

[0024] In a 1000L enamel reaction kettle, add 555kg of methyltriethoxysilane, 320kg of silicon-based latex, 6kg of hydrochloric acid and 25kg of water, and continuously stir and react at 25°C to 30°C for 40 hours. Finely filter the polycondensate solution of silicone resin, add 1000kg of n-butanol diluent, and stir evenly; then add 3kg of surfactant, and mix evenly. Discharging, sealed and packed in plastic barrels.

[0025] After the silicone resin hardening coating is coated and cured, the pencil hardness of the coating is measured to be above 6H, and the corrosion resistance is excellent.

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PUM

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Abstract

The invention discloses transparent organosilicon hard coating, in particular to organosilicon resin coating material which can form cementing excellent hard and compactness, and transparent and smooth coating with basis material after the basis material is used. Under the normal temperature, methyl tertiary alkane oxygen radical, silicon latex solution, polymerization catalyst and water are added in a reaction vessel according to certain scale, and mixed continuously and reacted for 10 to 50 hours until reaction liquid becomes homogeneous phase, and then the organosilicon resin condensation polymer is manufactrued. After condensation polymer solution is filtered, diluting solvent with appropriate amount is added to be mixed equably, and then polyether modified siloxane with appropriate amount is added to be used as surface active agent again, and uniform mixing is performed, thereby, the organosilicon resin hard coating is produced.

Description

technical field [0001] The invention relates to a transparent organosilicon hardening coating, in particular to an organosilicon resin coating material which can form a hard, dense, transparent and smooth coating with excellent bonding with the substrate after being applied to the substrate. Background technique [0002] Transparent silicone hardening coating is a colorless and transparent silicone resin solution formed by the hydrolysis and polymerization of polyfunctional silicone monomers under acid catalysis, and is a highly cross-linked polysiloxane. Transparent silicone hardening coatings can be used as hardening coatings for transparent plastics such as plexiglass, polycarbonate, polystyrene, etc., which can significantly improve their wear resistance, corrosion resistance and aging resistance, and can improve the optical properties of these materials. The transmittance of the lens. At the same time, the transparent silicone hardening coating can also be used as a pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04B05D3/02
Inventor 朱凯琴
Owner 朱凯琴